Abstract

A reheat system for a gas turbine engine includes a plurality of radial flameholders constructed of non-metallic material, such as a ceramic composite or carbon/carbon reinforced material, mounted on a metallic support structure in the engine jet pipe. The metallic support structure may be cooled by air from the engine bypass duct, and the non-metallic flameholders are capable of withstanding higher exhaust gas temperatures in the jet exhaust beyond the capability of currently used metal alloy materials. However, the mounting assembly must be capable of absorbing the considerable differential thermal expansion which will take place. Accordingly, the non-metallic flameholders are mounted on the metallic structure by means of dovetail mounting assemblies a clearance distance is provided between opposing end faces of the dovetail mounting assemblies into which is sprung a compressible resilient member which urges mounting faces of the dovetail assemblies into engagement but which is able to absorb differential thermal expansion and a degree of misalignment in the assemblies.